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Boundless Bio, Inc.

BOLD Net buying
CIK 0001782303 #4584 in the set updated 17 Sep 2026
Bought (120 mo)
$16.12M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$134.03K
$0.00 on a plan · $79.68K straight out of an exercise
Sold at will
$54.35K
1 of 3 sales
Net
+$15.98M
+$16.06M against sales at will

By person

7 insiders · 33 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
RA CAPITAL MANAGEMENT, L.P. entity
10% owner
$5.00M (2)
—
+$5.00M
295,844
1.30%
$878.66K
—
Burow Kristina
Director
$3.20M (2)
—
+$3.20M
1,181,766
5.20%
$3.51M
—
ARCH Venture Fund IX, L.P. entity
10% owner
$3.20M (2)
$39.84K (1) scheduled
+$3.16M
0
0.0000%
$0.00
—
CRANDELL KEITH
10% owner
$3.20M (2)
$39.84K (1) scheduled
+$3.16M
0
0.0000%
$0.00
—
TANG KEVIN
10% owner
$1.52M (22)
$54.35K (1)
+$1.46M
5,699,570
25.06%
$16.93M
+11.6%
Wellington Biomedical Innovation Master Investors (Cayman) I L.P.
10% owner
—
—
—
556,233
2.45%
$1.65M
—
Lim Jonathan E
Director
—
—
—
550,915
2.42%
$1.64M
+2,049%

Individual transactions

1
Insider
Date
Role
Action
Shares
Price
Amount
TANG KEVIN
26 Aug 2026
10% owner
Sell indirect
18,300
$2.97
$54.35K
Show all 33 transactions →

What was left out

Form 4 filings counted 54
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 12
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 2
Sales at will 1
Transactions with no price 0
Shares from compensation/vesting 10,258,801
History held since 29 Mar 2024